17836268. CONTROLLING INTERACTION BETWEEN COUPLED SUPERCONDUCTING QUANTUM BITS simplified abstract (INTERNATIONAL BUSINESS MACHINES CORPORATION)

CONTROLLING INTERACTION BETWEEN COUPLED SUPERCONDUCTING QUANTUM BITS

Organization Name

INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor(s)

Aaron Finck of White Plains NY (US)

Cihan Kurter of White Plains NY (US)

Sarunya Bangsaruntip of Mount Kisco NY (US)

Harry Jonathon Mamin of Palo Alto CA (US)

Charles Thomas Rettner of San Jose CA (US)

John Blair of Katonah NY (US)

George Andrew Keefe of Cortlandt Manor NY (US)

CONTROLLING INTERACTION BETWEEN COUPLED SUPERCONDUCTING QUANTUM BITS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17836268 titled 'CONTROLLING INTERACTION BETWEEN COUPLED SUPERCONDUCTING QUANTUM BITS

Simplified Explanation

The patent application describes a device that includes two superconducting quantum bits (qubits) and a coupler circuit. The qubits consist of superconducting tunnel junctions and shunt inductors, forming separate loops. The coupler circuit is connected between the qubits and is designed to enable entanglement gate operations between them through exchange interactions. When driven by a control signal, the coupler circuit facilitates entanglement between the qubits, and when not driven, it suppresses interaction between them.

• The device includes two superconducting qubits and a coupler circuit.
• Each qubit consists of a superconducting tunnel junction and a shunt inductor, forming separate loops.
• The coupler circuit is connected between the qubits.
• The coupler circuit enables entanglement gate operations between the qubits through exchange interactions.
• The coupler circuit is driven by a control signal to facilitate entanglement between the qubits.
• When not driven by the control signal, the coupler circuit suppresses interaction between the qubits.

Potential Applications

• Quantum computing
• Quantum communication
• Quantum information processing

Problems Solved

• Facilitates entanglement gate operations between superconducting qubits.
• Suppresses unwanted interaction between qubits when not needed.

Benefits

• Enables efficient entanglement between qubits.
• Provides control over qubit interactions.
• Enhances the capabilities of quantum computing and communication systems.

Original Abstract Submitted

A device comprises a first superconducting quantum bit, a second superconducting quantum bit, and a coupler circuit. The first superconducting quantum bit comprises a superconducting tunnel junction and a shunt inductor which form a first superconducting loop. The second superconducting quantum bit comprises a superconducting tunnel junction and a shunt inductor which form a second superconducting loop. The coupler circuit is coupled between the first and second superconducting quantum bits. The coupler circuit is configured to implement an entanglement gate operation between the first and second superconducting quantum bits through exchange interactions between the coupler circuit and the first superconducting quantum bit and the second superconducting quantum bit, when the coupler circuit is driven by a control signal. The coupler circuit is configured to suppress interaction between the first superconducting quantum bit and the second superconducting quantum bit, when the coupler circuit is not driven by the control signal.